Steam-boiler



2 Sheets-Sheet 2.

(No Model.)

` ,J. E. GREEN.

STEAM BOILER.

No. 517,745. Patented Apr. 3, 1894.

Fal' :I:

.UNITED STATES PATENT OFFICE.

JAMES E. GREEN, OF ST. LOUIS, MISSOURI.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 517,745, dated April 3, 1894.

Application filed February 20, 1893. Serial No. 463,024. (No model.)

To a/ZZ whom t may concern,.-

Be it known that I, JAMES E. GREEN, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Steam-Boilers, of which' the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specilicationl This is' an improvement in the class of steam boilers in which coal oil is used for fuel.

Figure I is a vertical section of the boiler at I-L Fig. II. Fig. II is a horizontal section at II-II, Fig. I. A Fig. III is a horizontal section at III-IIL Fig. I.

1 is the stand, which may be of any form of construction, and which is made with a central opening 2 to allow access to the bottom sheet of the boiler proper and is provided with a horizontal flange l, 1 i

3 is a combustion chamber surrounded `by water at the top, bottom and sides, the same being supported by brackets 4, the neck 5 through'which the gas jet enters and the tubes f 6 in its top sheet through which the products of combustion escape from the chamber. The combustion chamber has a top 7, bottom 8, and sides 9, which latter are shown parallel with the outer walls lO'of the boiler.

l1 are numerous vertical pipeslocated in the middle of and passing through the combustion chamber 3 and through the top and bottom sheets '7 and 8 of said chamber. These pipes thus communicate between the water space beneath the tire chamber and the Water space ,above said chamberand it will be seen that there will be a very rapid upward passage of water through those pipes; and also that the water will be abundantly supplied to their lower ends from the water space beneath, the water passing down betweenl the outer walls of the boiler and the combustion chamber. -An outer series of pipes 1la discharge upwardly betweenY the two series of tubes 6.

Any suitable ignited jetof coal oil, or other combustible vfluid may be projected through the neck 5, so as to till the combustion chamber with iiame. No novelty is claimed in this jet. A very etticient jet or llame is made byl means of a steam-injector in connection with 5o asupply of the combustible fluid. In this.

case, the steam and combustible fluid mingle in the injector and mingle with the air outside the injector. I do not, however, claim any novelty in the injector nor contine myself to any. special device for throwing a jet of combustible matter into the {ire-chamber.

The pipesv Il are secured in the top and bottom sheets of the fire-chamber by expanding their ends (in the usual way). The bottom sheet 12 of the boiler has a hole in line with each ofthe. pipes 1l by which access can be had to the interior of the pipes. These holes are stopped with screw-plugs 13, The tubes 6 pass through the top plate 7 of the'irechamber and the top sheet '14 of theboiler and are secured in the plates by expanding their ends. These tubes discharge into a smoke-chamber or dome 15 and the gases escape through a chimney 16. y

17 is a man-hole or hand-hole through which access is had to thc interior ofthe boiler.

I have shown no steam or Water pipes, as they do not form any part of the invention.

Iclaiin as my invention- Y The combinationof the stand 1 having a horizontal liange la, the outer wall 10 supported on the ange, having a bottom sheet l2, and a top sheet I4, the dome 15 having a` vchimney l6,`th e combustion chamber 3 having a top 7,a bottom Sand sides 9, the brackets 4 by which the combustion chamber is supported on the outer wall, out of contact with the latter and the bottom thereof, the neck 5,

extending through the side of the outer wall and the combustionchamb er, for the insertion of the gas-jet, thevertical pipes 1l` located in and passing throughthe'middle of the combustion chamber, the double series of tubes 6 surrounding the tops of the middle pipes and passing through the top plate of the combustion-chamber and through the topplate of the outer wall, and the outer series ot' pipes lla, located in land passing through the combustion-chamber, and discharging upwardly between the series vot tubes; substantially as described.

JAMES E. GREEN. In presence of- ALBEET M. EBERsoLE, Y E. S. KNIGHT. 

